I shall reveal this knowledge together with its realization, completely. Knowing this, nothing more will remain here to be known.

Kṛṣṇa promises jñāna (theoretical knowledge) saha vijñānena (with direct realization). It will be aśeṣataḥ (without remainder, complete).

The result: na… anyat jñātavyam avaśiṣyate — nothing else remains to be known. It is complete knowledge of the Absolute, not fragmentary. To know Kṛṣṇa is to know all, for everything rests in Him.